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enable airline
[etc/vim.git] / .vim / syntax / tex.vim
index 72560a141a3f5ce166c38bcb9f7b71f792f630d6..14e1bd6e3341a42ef6c8cd922439726a6021936b 100644 (file)
@@ -1,8 +1,559 @@
-syntax match TexMySection "^\\section{.*}"
-syntax match TexMySubSection "^\\subsection{.*}"
-syntax match TexMySubSubSection "^\\subsubsection{.*}"
-syntax match TexMyParagraph "^\\paragraph{.*}"
-highlight TexMySection ctermbg=black ctermfg=white cterm=bold term=reverse
-highlight TexMySubSection ctermbg=blue ctermfg=white cterm=bold term=reverse
-highlight TexMySubSubSection ctermbg=cyan ctermfg=black cterm=bold term=reverse
-highlight TexMyParagraph ctermbg=none ctermfg=blue cterm=bold term=reverse
+" Vim syntax file
+" Language:    TeX
+" Maintainer:  Dr. Charles E. Campbell, Jr. <NdrchipO@ScampbellPfamily.AbizM>
+" Last Change: Feb 27, 2007
+" Version:     37
+" URL:         http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
+"
+" Notes: {{{1
+"
+" 1. If you have a \begin{verbatim} that appears to overrun its boundaries,
+"    use %stopzone.
+"
+" 2. Run-on equations ($..$ and $$..$$, particularly) can also be stopped
+"    by suitable use of %stopzone.
+"
+" 3. If you have a slow computer, you may wish to modify
+"
+"      syn sync maxlines=200
+"      syn sync minlines=50
+"
+"    to values that are more to your liking.
+"
+" 4. There is no match-syncing for $...$ and $$...$$; hence large
+"    equation blocks constructed that way may exhibit syncing problems.
+"    (there's no difference between begin/end patterns)
+"
+" 5. If you have the variable "g:tex_no_error" defined then none of the
+"    lexical error-checking will be done.
+"
+"    ie. let g:tex_no_error=1
+
+" Version Clears: {{{1
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+" Define the default highlighting. {{{1
+" For version 5.7 and earlier: only when not done already
+" For version 5.8 and later: only when an item doesn't have highlighting yet
+if version >= 508 || !exists("did_tex_syntax_inits")
+ let did_tex_syntax_inits = 1
+ if version < 508
+  command -nargs=+ HiLink hi link <args>
+ else
+  command -nargs=+ HiLink hi def link <args>
+ endif
+endif
+if exists("g:tex_tex") && !exists("g:tex_no_error")
+ let g:tex_no_error= 1
+endif
+
+" Determine whether or not to use "*.sty" mode {{{1
+" The user may override the normal determination by setting
+"   g:tex_stylish to 1      (for    "*.sty" mode)
+"    or to           0 else (normal "*.tex" mode)
+" or on a buffer-by-buffer basis with b:tex_stylish
+let b:extfname=expand("%:e")
+if exists("g:tex_stylish")
+ let b:tex_stylish= g:tex_stylish
+elseif !exists("b:tex_stylish")
+ if b:extfname == "sty" || b:extfname == "cls" || b:extfname == "clo" || b:extfname == "dtx" || b:extfname == "ltx"
+  let b:tex_stylish= 1
+ else
+  let b:tex_stylish= 0
+ endif
+endif
+
+" handle folding {{{1
+if !exists("g:tex_fold_enabled")
+ let g:tex_fold_enabled= 0
+elseif g:tex_fold_enabled && !has("folding")
+ let g:tex_fold_enabled= 0
+ echomsg "Ignoring g:tex_fold_enabled=".g:tex_fold_enabled."; need to re-compile vim for +fold support"
+endif
+if g:tex_fold_enabled && &fdm == "manual"
+ set fdm=syntax
+endif
+
+" (La)TeX keywords: only use the letters a-zA-Z {{{1
+" but _ is the only one that causes problems.
+if version < 600
+  set isk-=_
+  if b:tex_stylish
+    set isk+=@
+  endif
+else
+  setlocal isk-=_
+  if b:tex_stylish
+    setlocal isk+=@
+  endif
+endif
+
+" Clusters: {{{1
+" --------
+syn cluster texCmdGroup                contains=texCmdBody,texComment,texDefParm,texDelimiter,texDocType,texInput,texLength,texLigature,texMathDelim,texMathOper,texNewCmd,texNewEnv,texRefZone,texSection,texSectionMarker,texSectionName,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texURLZone,texAcroZone
+if !exists("g:tex_no_error")
+ syn cluster texCmdGroup       add=texMathError
+endif
+syn cluster texEnvGroup                contains=texMatcher,texMathDelim,texSpecialChar,texStatement
+syn cluster texFoldGroup       contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texInputFile,texLength,texLigature,texMatcher,texMathZoneV,texMathZoneW,texMathZoneX,texMathZoneY,texMathZoneZ,texNewCmd,texNewEnv,texOnlyMath,texOption,texParen,texRefZone,texSection,texSectionMarker,texSectionZone,texSpaceCode,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,@texMathZones,texTitle,texAbstract,texURLZone,texAcroZone
+syn cluster texMatchGroup      contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption,texURLZone,texAcroZone,@Spell
+syn cluster texRefGroup                contains=texMatcher,texComment,texDelimiter
+if !exists("tex_no_math")
+ syn cluster texMathZones      contains=texMathZoneV,texMathZoneW,texMathZoneX,texMathZoneY,texMathZoneZ
+ syn cluster texMatchGroup     add=@texMathZones
+ syn cluster texMathDelimGroup contains=texMathDelimBad,texMathDelimKey,texMathDelimSet1,texMathDelimSet2
+ syn cluster texMathMatchGroup contains=@texMathZones,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMathDelim,texMathMatcher,texMathOper,texNewCmd,texNewEnv,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone
+ syn cluster texMathZoneGroup  contains=texComment,texDelimiter,texLength,texMathDelim,texMathMatcher,texMathOper,texRefZone,texSpecialChar,texStatement,texTypeSize,texTypeStyle
+ if !exists("g:tex_no_error")
+  syn cluster texMathMatchGroup        add=texMathError
+  syn cluster texMathZoneGroup add=texMathError
+ endif
+ syn cluster texMathZoneGroup add=@NoSpell
+ " following used in the \part \chapter \section \subsection \subsubsection
+ " \paragraph \subparagraph \author \title highlighting
+ syn cluster texDocGroup               contains=texPartZone,@texPartGroup
+ syn cluster texPartGroup              contains=texChapterZone,texSectionZone,texParaZone
+ syn cluster texChapterGroup           contains=texSectionZone,texParaZone
+ syn cluster texSectionGroup           contains=texSubSectionZone,texParaZone
+ syn cluster texSubSectionGroup                contains=texSubSubSectionZone,texParaZone
+ syn cluster texSubSubSectionGroup     contains=texParaZone
+ syn cluster texParaGroup              contains=texSubParaZone
+endif
+syn cluster texURLGroup                        contains=texMatcher,@NoSpell
+syn cluster texAcroGroup               contains=texMatcher,@NoSpell
+
+" Try to flag {} and () mismatches: {{{1
+if !exists("g:tex_no_error")
+ syn region texMatcher         matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"      end="}"         contains=@texMatchGroup,texError
+ syn region texMatcher         matchgroup=Delimiter start="\["                         end="]"         contains=@texMatchGroup,texError
+else
+ syn region texMatcher         matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"      end="}"         contains=@texMatchGroup
+ syn region texMatcher         matchgroup=Delimiter start="\["                         end="]"         contains=@texMatchGroup
+endif
+syn region texParen            start="("                                               end=")"         contains=@texMatchGroup,@Spell
+if !exists("g:tex_no_error")
+ syn match  texError           "[}\])]"
+endif
+if !exists("tex_no_math")
+ if !exists("g:tex_no_error")
+  syn match  texMathError      "}"     contained
+ endif
+ syn region texMathMatcher     matchgroup=Delimiter start="{"  skip="\\\\\|\\}"  end="}" end="%stopzone\>" contained contains=@texMathMatchGroup
+endif
+
+" TeX/LaTeX keywords: {{{1
+" Instead of trying to be All Knowing, I just match \..alphameric..
+" Note that *.tex files may not have "@" in their \commands
+if exists("g:tex_tex") || b:tex_stylish
+  syn match texStatement       "\\[a-zA-Z@]\+"
+else
+  syn match texStatement       "\\\a\+"
+  if !exists("g:tex_no_error")
+   syn match texError          "\\\a*@[a-zA-Z@]*"
+  endif
+endif
+
+" TeX/LaTeX delimiters: {{{1
+syn match texDelimiter         "&"
+syn match texDelimiter         "\\\\"
+
+" Tex/Latex Options: {{{1
+syn match texOption    "[^\\]\zs#\d\+\|^#\d\+"
+
+" texAccent (tnx to Karim Belabas) avoids annoying highlighting for accents: {{{1
+if b:tex_stylish
+  syn match texAccent          "\\[bcdvuH][^a-zA-Z@]"me=e-1
+  syn match texLigature                "\\\([ijolL]\|ae\|oe\|ss\|AA\|AE\|OE\)[^a-zA-Z@]"me=e-1
+else
+  syn match texAccent          "\\[bcdvuH]\A"me=e-1
+  syn match texLigature                "\\\([ijolL]\|ae\|oe\|ss\|AA\|AE\|OE\)\A"me=e-1
+endif
+syn match texAccent            "\\[bcdvuH]$"
+syn match texAccent            +\\[=^.\~"`']+
+syn match texAccent            +\\['=t'.c^ud"vb~Hr]{\a}+
+syn match texLigature          "\\\([ijolL]\|ae\|oe\|ss\|AA\|AE\|OE\)$"
+
+" \begin{}/\end{} section markers: {{{1
+syn match  texSectionMarker    "\\begin\>\|\\end\>" nextgroup=texSectionName
+syn region texSectionName      matchgroup=Delimiter start="{" end="}"  contained nextgroup=texSectionModifier
+syn region texSectionModifier  matchgroup=Delimiter start="\[" end="]" contained
+
+" \documentclass, \documentstyle, \usepackage: {{{1
+syn match  texDocType          "\\documentclass\>\|\\documentstyle\>\|\\usepackage\>"  nextgroup=texSectionName,texDocTypeArgs
+syn region texDocTypeArgs      matchgroup=Delimiter start="\[" end="]"                 contained       nextgroup=texSectionName
+
+" Preamble syntax-based folding support: {{{1
+if g:tex_fold_enabled && has("folding")
+ syn region texPreamble        transparent fold        start='\zs\\documentclass\>' end='\ze\\begin{document}' contains=@texMatchGroup
+endif
+
+" TeX input: {{{1
+syn match texInput             "\\input\s\+[a-zA-Z/.0-9_^]\+"hs=s+7                            contains=texStatement
+syn match texInputFile         "\\include\(graphics\|list\)\=\(\[.\{-}\]\)\=\s*{.\{-}}"        contains=texStatement,texInputCurlies
+syn match texInputFile         "\\\(epsfig\|input\|usepackage\)\s*\(\[.*\]\)\={.\{-}}"         contains=texStatement,texInputCurlies,texInputFileOpt
+syn match texInputCurlies      "[{}]"                                                          contained
+syn region texInputFileOpt     matchgroup=Delimiter start="\[" end="\]"                        contained
+
+" Type Styles (LaTeX 2.09): {{{1
+syn match texTypeStyle         "\\rm\>"
+syn match texTypeStyle         "\\em\>"
+syn match texTypeStyle         "\\bf\>"
+syn match texTypeStyle         "\\it\>"
+syn match texTypeStyle         "\\sl\>"
+syn match texTypeStyle         "\\sf\>"
+syn match texTypeStyle         "\\sc\>"
+syn match texTypeStyle         "\\tt\>"
+
+" Type Styles: attributes, commands, families, etc (LaTeX2E): {{{1
+syn match texTypeStyle         "\\textbf\>"
+syn match texTypeStyle         "\\textit\>"
+syn match texTypeStyle         "\\textmd\>"
+syn match texTypeStyle         "\\textrm\>"
+syn match texTypeStyle         "\\textsc\>"
+syn match texTypeStyle         "\\textsf\>"
+syn match texTypeStyle         "\\textsl\>"
+syn match texTypeStyle         "\\texttt\>"
+syn match texTypeStyle         "\\textup\>"
+syn match texTypeStyle         "\\emph\>"
+
+syn match texTypeStyle         "\\mathbb\>"
+syn match texTypeStyle         "\\mathbf\>"
+syn match texTypeStyle         "\\mathcal\>"
+syn match texTypeStyle         "\\mathfrak\>"
+syn match texTypeStyle         "\\mathit\>"
+syn match texTypeStyle         "\\mathnormal\>"
+syn match texTypeStyle         "\\mathrm\>"
+syn match texTypeStyle         "\\mathsf\>"
+syn match texTypeStyle         "\\mathtt\>"
+
+syn match texTypeStyle         "\\rmfamily\>"
+syn match texTypeStyle         "\\sffamily\>"
+syn match texTypeStyle         "\\ttfamily\>"
+
+syn match texTypeStyle         "\\itshape\>"
+syn match texTypeStyle         "\\scshape\>"
+syn match texTypeStyle         "\\slshape\>"
+syn match texTypeStyle         "\\upshape\>"
+
+syn match texTypeStyle         "\\bfseries\>"
+syn match texTypeStyle         "\\mdseries\>"
+
+" Some type sizes: {{{1
+syn match texTypeSize          "\\tiny\>"
+syn match texTypeSize          "\\scriptsize\>"
+syn match texTypeSize          "\\footnotesize\>"
+syn match texTypeSize          "\\small\>"
+syn match texTypeSize          "\\normalsize\>"
+syn match texTypeSize          "\\large\>"
+syn match texTypeSize          "\\Large\>"
+syn match texTypeSize          "\\LARGE\>"
+syn match texTypeSize          "\\huge\>"
+syn match texTypeSize          "\\Huge\>"
+
+" Spacecodes (TeX'isms): {{{1
+" \mathcode`\^^@="2201  \delcode`\(="028300  \sfcode`\)=0 \uccode`X=`X  \lccode`x=`x
+syn match texSpaceCode         "\\\(math\|cat\|del\|lc\|sf\|uc\)code`"me=e-1 nextgroup=texSpaceCodeChar
+syn match texSpaceCodeChar    "`\\\=.\(\^.\)\==\(\d\|\"\x\{1,6}\|`.\)" contained
+
+" Sections, subsections, etc: {{{1
+if g:tex_fold_enabled && has("folding")
+ syn region texDocZone                 matchgroup=texSection start='\\begin\s*{\s*document\s*}' end='\\end\s*{\s*document\s*}' fold contains=@texFoldGroup,@texDocGroup,@Spell
+ syn region texPartZone                        matchgroup=texSection start='\\part\>'                   end='\n\ze\s*\\part\>'         fold contains=@texFoldGroup,@texPartGroup,@Spell
+ syn region texChapterZone             matchgroup=texSection start='\\chapter\>'                end='\n\ze\s*\\chapter\>'      fold contains=@texFoldGroup,@texChapterGroup,@Spell
+ syn region texSectionZone             matchgroup=texSection start='\\section\>'                end='\n\ze\s*\\section\>'      fold contains=@texFoldGroup,@texSectionGroup,@Spell
+ syn region texSubSectionZone          matchgroup=texSection start='\\subsection\>'             end='\n\ze\s*\\subsection\>'   fold contains=@texFoldGroup,@texSubSectionGroup,@Spell
+ syn region texSubSubSectionZone       matchgroup=texSection start='\\subsubsection\>'         end='\n\ze\s*\\subsubsection\>' fold contains=@texFoldGroup,@texSubSubSectionGroup,@Spell
+ syn region texParaZone                        matchgroup=texSection start='\\paragraph\>'              end='\n\ze\s*\\paragraph\>'    fold contains=@texFoldGroup,@texParaGroup,@Spell
+ syn region texSubParaZone             matchgroup=texSection start='\\subparagraph\>'           end='\n\ze\s*\\subparagraph\>' fold contains=@texFoldGroup,@Spell
+ syn region texTitle                   matchgroup=texSection start='\\\%(author\|title\)\>\s*{' end='}'                fold contains=@texFoldGroup,@Spell
+ syn region texAbstract                        matchgroup=texSection start='\\begin\s*{\s*abstract\s*}' end='\\end\s*{\s*abstract\s*}' fold contains=@texFoldGroup,@Spell
+else
+ syn region texDocZone                 matchgroup=texSection start='\\begin\s*{\s*document\s*}' end='\\end\s*{\s*document\s*}' contains=@texFoldGroup,@texDocGroup,@Spell
+ syn region texPartZone                        matchgroup=texSection start='\\part\>'                   end='\n\ze\s*\\part\>'         contains=@texFoldGroup,@texPartGroup,@Spell
+ syn region texChapterZone             matchgroup=texSection start='\\chapter\>'                end='\n\ze\s*\\chapter\>'      contains=@texFoldGroup,@texChapterGroup,@Spell
+ syn region texSectionZone             matchgroup=texSection start='\\section\>'                end='\n\ze\s*\\section\>'      contains=@texFoldGroup,@texSectionGroup,@Spell
+ syn region texSubSectionZone          matchgroup=texSection start='\\subsection\>'             end='\n\ze\s*\\subsection\>'   contains=@texFoldGroup,@texSubSectionGroup,@Spell
+ syn region texSubSubSectionZone       matchgroup=texSection start='\\subsubsection\>'         end='\n\ze\s*\\subsubsection\>' contains=@texFoldGroup,@texSubSubSectionGroup,@Spell
+ syn region texParaZone                        matchgroup=texSection start='\\paragraph\>'              end='\n\ze\s*\\paragraph\>'    contains=@texFoldGroup,@texParaGroup,@Spell
+ syn region texSubParaZone             matchgroup=texSection start='\\subparagraph\>'           end='\n\ze\s*\\subparagraph\>' contains=@texFoldGroup,@Spell
+ syn region texTitle                   matchgroup=texSection start='\\\%(author\|title\)\>\s*{' end='}'                        contains=@texFoldGroup,@Spell
+ syn region texAbstract                        matchgroup=texSection start='\\begin\s*{\s*abstract\s*}' end='\\end\s*{\s*abstract\s*}' contains=@texFoldGroup,@Spell
+endif
+
+" Bad Math (mismatched): {{{1
+if !exists("tex_no_math")
+ syn match texBadMath          "\\end\s*{\s*\(array\|gathered\|bBpvV]matrix\|split\|subequations\|smallmatrix\|xxalignat\)\s*}"
+ syn match texBadMath          "\\end\s*{\s*\(align\|alignat\|displaymath\|displaymath\|eqnarray\|equation\|flalign\|gather\|math\|multline\|xalignat\)\*\=\s*}"
+ syn match texBadMath          "\\[\])]"
+endif
+
+" Math Zones: {{{1
+if !exists("tex_no_math")
+ " TexNewMathZone: function creates a mathzone with the given suffix and mathzone name. {{{2
+ "                 Starred forms are created if starform is true.  Starred
+ "                 forms have syntax group and synchronization groups with a
+ "                 "S" appended.  Handles: cluster, syntax, sync, and HiLink.
+ fun! TexNewMathZone(sfx,mathzone,starform)
+   let grpname  = "texMathZone".a:sfx
+   let syncname = "texSyncMathZone".a:sfx
+   exe "syn cluster texMathZones add=".grpname
+   exe 'syn region '.grpname.' start='."'".'\\begin\s*{\s*'.a:mathzone.'\s*}'."'".' end='."'".'\\end\s*{\s*'.a:mathzone.'\s*}'."'".' keepend contains=@texMathZoneGroup'
+   exe 'syn sync match '.syncname.' grouphere '.grpname.' "\\begin\s*{\s*'.a:mathzone.'\*\s*}"'
+   exe 'syn sync match '.syncname.' grouphere '.grpname.' "\\begin\s*{\s*'.a:mathzone.'\*\s*}"'
+   exe 'HiLink '.grpname.' texMath'
+   if a:starform
+    let grpname  = "texMathZone".a:sfx.'S'
+    let syncname = "texSyncMathZone".a:sfx.'S'
+    exe "syn cluster texMathZones add=".grpname
+    exe 'syn region '.grpname.' start='."'".'\\begin\s*{\s*'.a:mathzone.'\*\s*}'."'".' end='."'".'\\end\s*{\s*'.a:mathzone.'\*\s*}'."'".' keepend contains=@texMathZoneGroup'
+    exe 'syn sync match '.syncname.' grouphere '.grpname.' "\\begin\s*{\s*'.a:mathzone.'\*\s*}"'
+    exe 'syn sync match '.syncname.' grouphere '.grpname.' "\\begin\s*{\s*'.a:mathzone.'\*\s*}"'
+    exe 'HiLink '.grpname.' texMath'
+   endif
+ endfun
+
+ " Standard Math Zones: {{{2
+ call TexNewMathZone("A","align",1)
+ call TexNewMathZone("B","alignat",1)
+ call TexNewMathZone("C","displaymath",1)
+ call TexNewMathZone("D","eqnarray",1)
+ call TexNewMathZone("E","equation",1)
+ call TexNewMathZone("F","flalign",1)
+ call TexNewMathZone("G","gather",1)
+ call TexNewMathZone("H","math",1)
+ call TexNewMathZone("I","multline",1)
+ call TexNewMathZone("J","subequations",0)
+ call TexNewMathZone("K","xalignat",1)
+ call TexNewMathZone("L","xxalignat",0)
+
+ " Inline Math Zones: {{{2
+ syn region texMathZoneV       matchgroup=Delimiter start="\\("        matchgroup=Delimiter end="\\)\|%stopzone\>"     keepend contains=@texMathZoneGroup
+ syn region texMathZoneW       matchgroup=Delimiter start="\\\["       matchgroup=Delimiter end="\\]\|%stopzone\>"     keepend contains=@texMathZoneGroup
+ syn region texMathZoneX       matchgroup=Delimiter start="\$" skip="\\\\\|\\\$" matchgroup=Delimiter end="\$" end="%stopzone\>"       contains=@texMathZoneGroup
+ syn region texMathZoneY       matchgroup=Delimiter start="\$\$" matchgroup=Delimiter end="\$\$" end="%stopzone\>"     keepend         contains=@texMathZoneGroup
+ syn region texMathZoneZ       matchgroup=texStatement start="\\ensuremath\s*{" matchgroup=texStatement end="}" end="%stopzone\>"      contains=@texMathZoneGroup
+
+ syn match texMathOper         "[_^=]" contained
+
+ " \left..something.. and \right..something.. support: {{{2
+ syn match   texMathDelimBad   contained               "\S"
+ syn match   texMathDelim      contained               "\\\(left\|right\|[bB]igg\=[lr]\)\>"    skipwhite nextgroup=texMathDelimSet1,texMathDelimSet2,texMathDelimBad
+ syn match   texMathDelim      contained               "\\\(left\|right\)arrow\>\|\<\([aA]rrow\|brace\)\=vert\>"
+ syn match   texMathDelim      contained               "\\lefteqn\>"
+ syn match   texMathDelimSet2  contained       "\\"            nextgroup=texMathDelimKey,texMathDelimBad
+ syn match   texMathDelimSet1  contained       "[<>()[\]|/.]\|\\[{}|]"
+ syn keyword texMathDelimKey   contained       backslash       lceil           lVert           rgroup          uparrow
+ syn keyword texMathDelimKey   contained       downarrow       lfloor          rangle          rmoustache      Uparrow
+ syn keyword texMathDelimKey   contained       Downarrow       lgroup          rbrace          rvert           updownarrow
+ syn keyword texMathDelimKey   contained       langle          lmoustache      rceil           rVert           Updownarrow
+ syn keyword texMathDelimKey   contained       lbrace          lvert           rfloor
+endif
+
+" Special TeX characters  ( \$ \& \% \# \{ \} \_ \S \P ) : {{{1
+syn match texSpecialChar       "\\[$&%#{}_]"
+if b:tex_stylish
+  syn match texSpecialChar     "\\[SP@][^a-zA-Z@]"me=e-1
+else
+  syn match texSpecialChar     "\\[SP@]\A"me=e-1
+endif
+syn match texSpecialChar       "\\\\"
+if !exists("tex_no_math")
+ syn match texOnlyMath         "[_^]"
+endif
+syn match texSpecialChar       "\^\^[0-9a-f]\{2}\|\^\^\S"
+
+" Comments: {{{1
+"    Normal TeX LaTeX     :   %....
+"    Documented TeX Format:  ^^A...    -and-   leading %s (only)
+syn cluster texCommentGroup    contains=texTodo,@NoSpell
+syn case ignore
+syn keyword texTodo            contained               combak  fixme   todo    xxx
+syn case match
+if b:extfname == "dtx"
+  syn match texComment         "\^\^A.*$"      contains=@texCommentGroup
+  syn match texComment         "^%\+"          contains=@texCommentGroup
+else
+  if g:tex_fold_enabled
+   " allows syntax-folding of 2 or more contiguous comment lines
+   " single-line comments are not folded
+   syn match  texComment       "%.*$"          contains=@texCommentGroup
+   syn region texComment       start="^\zs\s*%.*\_s*%" skip="^\s*%"    end='^\ze\s*[^%]' fold
+  else
+   syn match texComment                "%.*$"          contains=@texCommentGroup
+  endif
+endif
+
+" Separate lines used for verb` and verb# so that the end conditions {{{1
+" will appropriately terminate.  Ideally vim would let me save a
+" character from the start pattern and re-use it in the end-pattern.
+syn region texZone             start="\\begin{verbatim}"               end="\\end{verbatim}\|%stopzone\>"      contains=@Spell
+" listings package:
+syn region texZone             start="\\begin{lstlisting}"             end="\\end{lstlisting}\|%stopzone\>"    contains=@Spell
+" moreverb package:
+syn region texZone             start="\\begin{verbatimtab}"            end="\\end{verbatimtab}\|%stopzone\>"   contains=@Spell
+syn region texZone             start="\\begin{verbatimwrite}"          end="\\end{verbatimwrite}\|%stopzone\>" contains=@Spell
+syn region texZone             start="\\begin{boxedverbatim}"          end="\\end{boxedverbatim}\|%stopzone\>" contains=@Spell
+if version < 600
+ syn region texZone            start="\\verb\*\=`"                     end="`\|%stopzone\>"
+ syn region texZone            start="\\verb\*\=#"                     end="#\|%stopzone\>"
+else
+  if b:tex_stylish
+    syn region texZone         start="\\verb\*\=\z([^\ta-zA-Z@]\)"     end="\z1\|%stopzone\>"
+  else
+    syn region texZone         start="\\verb\*\=\z([^\ta-zA-Z]\)"      end="\z1\|%stopzone\>"
+  endif
+endif
+
+" Tex Reference Zones: {{{1
+syn region texZone             matchgroup=texStatement start="@samp{"                  end="}\|%stopzone\>"    contains=@texRefGroup
+syn region texRefZone          matchgroup=texStatement start="\\nocite{"               end="}\|%stopzone\>"    contains=@texRefGroup
+syn region texRefZone          matchgroup=texStatement start="\\bibliography{"         end="}\|%stopzone\>"    contains=@texRefGroup
+syn region texRefZone          matchgroup=texStatement start="\\label{"                end="}\|%stopzone\>"    contains=@texRefGroup
+syn region texRefZone          matchgroup=texStatement start="\\\(page\|eq\)ref{"      end="}\|%stopzone\>"    contains=@texRefGroup
+syn region texRefZone          matchgroup=texStatement start="\\v\=ref{"               end="}\|%stopzone\>"    contains=@texRefGroup
+syn match  texRefZone          '\\[cC]ite\%(\%(al\)\=\%([tp]\*\=\)\|num\|author\|year\|yearpar\|fullauthor\)\=' nextgroup=texRefOption,texCite
+syn match  texRefZone          '\\[cC]itetext' nextgroup=texRefOption,texFreeCite
+syn region texRefOption        contained       matchgroup=Delimiter start='\[' end=']'         contains=@texRefGroup,texCite   nextgroup=texRefOption,texCite
+syn region texCite     contained       matchgroup=Delimiter start='{' end='}'          contains=@texRefGroup
+syn region texFreeCite contained       matchgroup=Delimiter start="{"rs=s+1 skip="\\\\\|\\[{}]" matchgroup=Delimiter end="}" contains=@texMatchGroup
+
+" Handle newcommand, newenvironment : {{{1
+syn match  texNewCmd                           "\\newcommand\>"                        nextgroup=texCmdName skipwhite skipnl
+syn region texCmdName contained matchgroup=Delimiter start="{"rs=s+1  end="}"          nextgroup=texCmdArgs,texCmdBody skipwhite skipnl
+syn region texCmdArgs contained matchgroup=Delimiter start="\["rs=s+1 end="]"          nextgroup=texCmdBody skipwhite skipnl
+syn region texCmdBody contained matchgroup=Delimiter start="{"rs=s+1 skip="\\\\\|\\[{}]"       matchgroup=Delimiter end="}" contains=@texCmdGroup
+syn match  texNewEnv                           "\\newenvironment\>"                    nextgroup=texEnvName skipwhite skipnl
+syn region texEnvName contained matchgroup=Delimiter start="{"rs=s+1  end="}"          nextgroup=texEnvBgn skipwhite skipnl
+syn region texEnvBgn  contained matchgroup=Delimiter start="{"rs=s+1  end="}"          nextgroup=texEnvEnd skipwhite skipnl contains=@texEnvGroup
+syn region texEnvEnd  contained matchgroup=Delimiter start="{"rs=s+1  end="}"          skipwhite skipnl contains=@texEnvGroup
+
+" Definitions/Commands: {{{1
+syn match texDefCmd                            "\\def\>"                               nextgroup=texDefName skipwhite skipnl
+if b:tex_stylish
+  syn match texDefName contained               "\\[a-zA-Z@]\+"                         nextgroup=texDefParms,texCmdBody skipwhite skipnl
+  syn match texDefName contained               "\\[^a-zA-Z@]"                          nextgroup=texDefParms,texCmdBody skipwhite skipnl
+else
+  syn match texDefName contained               "\\\a\+"                                nextgroup=texDefParms,texCmdBody skipwhite skipnl
+  syn match texDefName contained               "\\\A"                                  nextgroup=texDefParms,texCmdBody skipwhite skipnl
+endif
+syn match texDefParms  contained               "#[^{]*"        contains=texDefParm     nextgroup=texCmdBody skipwhite skipnl
+syn match  texDefParm  contained               "#\d\+"
+
+" Tex URL Zones: {{{1
+syn region texURLZone          matchgroup=texURLZone start="\\\%(url\|href\){"         end="}\|%stopzone\>"    contains=@texURLGroup
+syn region texURLZone          matchgroup=texURLZone start="\\burl\%(alt\)\={"         end="}\|%stopzone\>"    contains=@texURLGroup
+syn region texURLZone          matchgroup=texURLZone start="\\\%(link\|email\){"       end="}\|%stopzone\>"    contains=@texURLGroup
+
+" Tex Acronym Zones: {{{1
+syn region texAcroZone         matchgroup=texAcroZone start="\\ac\%(fi\|[fls]\=p\=\)\*\={"     end="}\|%stopzone\>"    contains=@texAcroGroup
+syn region texAcroZone         matchgroup=texAcroZone start="\\ac\%(used\|[ls]u\*\=\){"                end="}\|%stopzone\>"    contains=@texAcroGroup
+
+" TeX Lengths: {{{1
+syn match  texLength           "\<\d\+\([.,]\d\+\)\=\s*\(true\)\=\s*\(bp\|cc\|cm\|dd\|em\|ex\|in\|mm\|pc\|pt\|sp\)\>"
+
+" TeX String Delimiters: {{{1
+syn match texString            "\(``\|''\|,,\)"
+
+" LaTeX synchronization: {{{1
+syn sync maxlines=200
+syn sync minlines=50
+
+syn  sync match texSyncStop                    groupthere NONE         "%stopzone\>"
+
+" Synchronization: {{{1
+" The $..$ and $$..$$ make for impossible sync patterns
+" (one can't tell if a "$$" starts or stops a math zone by itself)
+" The following grouptheres coupled with minlines above
+" help improve the odds of good syncing.
+if !exists("tex_no_math")
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{abstract}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{center}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{description}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{enumerate}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{itemize}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{table}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\end{tabular}"
+ syn sync match texSyncMathZoneA               groupthere NONE         "\\\(sub\)*section\>"
+endif
+
+" Highlighting: {{{1
+if did_tex_syntax_inits == 1
+ let did_tex_syntax_inits= 2
+  " TeX highlighting groups which should share similar highlighting
+  if !exists("g:tex_no_error")
+   if !exists("tex_no_math")
+    HiLink texBadMath          texError
+    HiLink texMathDelimBad     texError
+    HiLink texMathError                texError
+    if !b:tex_stylish
+      HiLink texOnlyMath       texError
+    endif
+   endif
+   HiLink texError             Error
+  endif
+
+  HiLink texCite               texRefZone
+  HiLink texDefCmd             texDef
+  HiLink texDefName            texDef
+  HiLink texDocType            texCmdName
+  HiLink texDocTypeArgs                texCmdArgs
+  HiLink texInputFileOpt       texCmdArgs
+  HiLink texInputCurlies       texDelimiter
+  HiLink texLigature           texSpecialChar
+  if !exists("tex_no_math")
+   HiLink texMathDelimSet1     texMathDelim
+   HiLink texMathDelimSet2     texMathDelim
+   HiLink texMathDelimKey      texMathDelim
+   HiLink texMathMatcher       texMath
+   HiLink texMathZoneW         texMath
+   HiLink texMathZoneX         texMath
+   HiLink texMathZoneY         texMath
+   HiLink texMathZoneZ         texMath
+  endif
+  HiLink texSectionMarker      texCmdName
+  HiLink texSectionName                texSection
+  HiLink texSpaceCode          texStatement
+  HiLink texTypeSize           texType
+  HiLink texTypeStyle          texType
+
+   " Basic TeX highlighting groups
+  HiLink texAcroZone           Special
+  HiLink texCmdArgs            Number
+  HiLink texCmdName            Statement
+  HiLink texComment            Comment
+  HiLink texDef                        Statement
+  HiLink texDefParm            Special
+  HiLink texDelimiter          Delimiter
+  HiLink texInput              Special
+  HiLink texInputFile          Special
+  HiLink texLength             Number
+  HiLink texMath               Special
+  HiLink texMathDelim          Statement
+  HiLink texMathOper           Operator
+  HiLink texNewCmd             Statement
+  HiLink texNewEnv             Statement
+  HiLink texOption             Number
+  HiLink texRefZone            Special
+  HiLink texSection            PreCondit
+  HiLink texSpaceCodeChar      Special
+  HiLink texSpecialChar                SpecialChar
+  HiLink texStatement          Statement
+  HiLink texString             String
+  HiLink texTodo               Todo
+  HiLink texType               Type
+  HiLink texURLZone            Special
+  HiLink texZone               PreCondit
+
+  delcommand HiLink
+endif
+
+" Current Syntax: {{{1
+unlet b:extfname
+let   b:current_syntax = "tex"
+" vim: ts=8 fdm=marker